WO2018076282A1

WO2018076282A1 - Mechanical-hydraulic integrated releasing device

Info

Publication number: WO2018076282A1
Application number: PCT/CN2016/103780
Authority: WO
Inventors: 邹伟; 张梦华; 刘练; 王博伟; 樊凌云; 谢进; 周生福; 李文霞; 杨坤
Original assignee: 中国石油化工股份有限公司
Priority date: 2016-10-28
Filing date: 2016-10-28
Publication date: 2018-05-03
Also published as: US20190271197A1; US11035180B2

Abstract

Disclosed is a mechanical-hydraulic integrated releasing device, comprising an upper joint (1), a lower joint (8) and a pawl (12). The upper joint (1) and the lower joint (8) are respectively connected to two ends of the pawl (12); an outer side of the pawl (12) is fitted over a releasing sleeve (6) capable of moving in an axial direction of the pawl, a step is arranged on an outer wall of a ratchet of the pawl (12), a groove matching the step is arranged on an inner wall of the releasing sleeve (6), and the step and the groove cooperate to limit the pawl (12); a releasing sleeve upper end (3) is arranged between the releasing sleeve (6) and the upper joint (1), one end of the releasing sleeve upper end (3) is inserted into the releasing sleeve (6), and the other end is fitted over an outer portion of the upper joint (1) and connected to the upper joint (1) via a start pin (9); and a pressure cavity is formed between the upper joint (1) and the releasing sleeve upper end (3), a hydraulic cavity is arranged in the upper joint (1), and two pressure transmission holes (13), which are in communication with the pressure cavity, are symmetrically arranged on a side wall of the hydraulic cavity in the radial direction. The problems that a mechanical releasing device is poor in resistance to tension and the reliability of a hydraulic releasing device is not high in the prior art are solved by the provided mechanical-hydraulic integrated releasing device.

Description

Machine fluid integrated hand thrower

Technical field

The invention relates to the field of oil field oil production technology, in particular to a machine-liquid integrated hand-cranking device, and more particularly to a safety hand-disconnecting joint used in an oil and gas well completion pipe string.

Background technique

The function of the safe drop joint used in the completion string of the oil and gas well is to use the safe drop joint to lift the upper column at the safe hand-off position when the lower completion string cannot be raised. Small losses and bring convenience to later work.

At present, there are two main types of safe hand-off joints used during completion: one is mechanically lost. This type of safe throwing hand has the advantages of convenient operation, high reliability, large tool diameter, etc., but its tensile strength is poor. As a result, once the card is encountered during the process of completing the completion of the string, it is easy to lose the hand in advance due to improper operation. The other type is hydraulic hand throwing. This kind of safe throwing hand has strong tensile strength, so it is not easy to accident when it is finished, but it needs to be pitched and pressed when it is lost. This operation is complicated and the reliability is not high. At the same time, there is generally a diameter reduction inside the hydraulic hand throwing hand, which is easy to bring inconvenience to the later construction.

Summary of the invention

(1) Technical problems to be solved

The technical problem to be solved by the invention is to provide a machine-liquid integrated hand-handling device, which effectively combines the mechanical hand-lost and the hydraulic hand-lost, and solves the problem that the mechanical lost hand has poor tensile strength and the hydraulic hand-lost in the prior art. The problem of low reliability.

(2) Technical plan

In order to solve the above technical problems, the present invention provides a machine-liquid integrated hand thrower comprising an upper joint, a lower joint and a pawl, the upper joint and the lower joint being respectively connected to both ends of the pawl; the spine The outer side of the claw is sleeved with a release sleeve movable along the axial direction thereof, and the outer wall of the ratchet of the pawl is provided with a step, and the inner wall of the release sleeve is provided with a groove matching the step. The step cooperates with the groove to limit the pawl; the upper end of the release sleeve is disposed between the release sleeve and the upper joint, and one end of the upper end of the release sleeve is inserted into the release sleeve The other end is sleeved on the outside of the upper joint and connected to the upper joint through a starting pin; a pressure chamber is formed between the upper joint and the upper end of the release sleeve, and a hydraulic chamber is arranged inside the upper joint. Two pressure transmitting holes communicating with the pressure chamber are radially symmetrically disposed on the side wall of the hydraulic chamber.

Further, the outer wall of the upper joint is bounded by the pressure transmitting hole, and the outer diameter of the upper joint away from the end of the release sleeve is larger than the other end; the outer wall of the pressure transmitting hole and the release sleeve The inner wall of the upper end constitutes a pressure chamber, and the two ends of the pressure chamber are respectively provided with a first sealing structure.

Further, a guard ring is disposed between the pawl and the upper end of the release sleeve, the guard ring is sleeved on the upper joint, and the guard ring is connected to the release sleeve by a thread.

Further, the upper joint is provided with a lock ring for limiting the upper end of the release sleeve.

Further, the inner wall of the connection between the upper end of the release sleeve and the retaining ring is provided with a locking groove. When the position of the locking groove corresponds to the locking ring, the locking groove and the locking ring cooperate with the upper end of the release sleeve. Axial limit.

Further, the ratchet teeth of the aforementioned pawl and the upper joint are connected by a tooth engagement, and the tooth bearing angle is 35°.

Further, an end of the upper joint adjacent to the lower joint is connected to the handle by a throwing pin, and the lower joint is fixedly connected to the handle.

Further, a second sealing structure is disposed between the end of the upper joint adjacent to the lower joint and the thorn.

Further, the end of the upper joint is sleeved with an upper end centralizer, and the upper joint and the upper centralizer are connected by a thread.

Further, the end of the lower joint is sleeved with a lower centralizer, and the lower joint and the lower centralizer are connected by a thread.

(3) Beneficial effects

The above technical solution of the present invention has the following beneficial effects:

The invention provides a machine-liquid integrated hand-lost device, wherein the outer side of the pawl is sleeved with a release sleeve movable along the axial direction thereof, and the step on the outer wall of the ratchet tooth of the pawl cooperates with the groove on the inner wall of the release sleeve to cooperate with the spine The claws are restrained to ensure that the pawl cannot be opened under the action of the pulling force, thereby enhancing the tensile resistance of the hand lost device, so that the upper connector and the lower connector are connected by the pawl during the completion of the completion of the tubular string, and an accident is encountered. The jam does not cause accidental loss of hands.

The invention provides a machine-liquid integrated hand-lost device, wherein an upper end of the release sleeve is arranged between the release sleeve and the upper joint, one end of the upper end of the release sleeve is inserted into the release sleeve, and the other end is sleeved outside the upper joint, and the start pin is passed The upper joint is connected with the upper joint; a pressure chamber is formed between the upper joint and the upper end of the release sleeve, and a hydraulic chamber is disposed inside the upper joint, and two pressure transmitting holes communicating with the pressure chamber are symmetrically disposed on the side wall of the hydraulic chamber. When the hand thrower is in the lower completion string, the upper joint and the lower joint only rely on the pawl connection, and the hand pin is not subjected to the force; after the completion string is in place, the inside and outside of the oil pipe exist due to the seat packer or the acid pressure construction. The pressure difference, so the hand thrower can use the piston force generated by the pressure difference to cut the starting pin, so that the release sleeve moves in the direction of the downward joint, thereby causing the release of the pawl to fail, and the safely losing the joint and the lower joint are completely connected by the pin; When the pipe string is repaired and the lower pipe string meets the card, and the tonnage reaches the set value of the lost pin, the pin is cut to separate the upper and lower joints, and the upper pipe string can be smoothly raised.

DRAWINGS

FIG. 1 is a schematic view showing the specific structure of the machine-liquid integrated hand thrower of the present invention.

Among them, 1: upper joint; 2: upper end centralizer; 3: release sleeve upper end; 4: guard ring; 5: lock ring; 6: release sleeve; 7: lower end centralizer; 8: lower joint; 9: start pin; 10: throwing pin; 11: sealing support ring; 12: pawl; 13: pressure transmission hole; 14: thrust screw; 15: O-ring.

detailed description

Embodiments of the present invention will be further described in detail below with reference to the drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that, unless otherwise stated, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inside" The orientation or positional relationship of the indications of "outside", "front end", "back end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and The simplification of the description is not intended to limit or imply that the device or component that is referred to has a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting. Moreover, the terms "first", "second", "third", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in FIG. 1 , the machine-liquid integrated hand thrower provided by the embodiment includes an upper joint 1 , a lower joint 8 and a pawl 12 , and the upper joint 1 and the lower joint 8 are respectively connected to two ends of the pawl 12 . The outer side of the pawl 12 is sleeved with a release sleeve 6 movable along the axial direction thereof. The outer wall of the ratchet 12 is provided with a step. The inner wall of the release sleeve 6 is provided with a groove matching the step, and the step and the groove are matched with each other. The pawl 12 is restrained, that is, the step is completely in contact with the reduced diameter portion on the inner wall of the release sleeve 6, so that the pawl 12 cannot be opened under the pulling force, which improves the tensile strength of the hand thrower and enhances the loss. The reliability of the hand-handling device causes the hand-lost device to fail to accidentally lose hands in the event of an accidental jamming during the completion of the completion of the pipe string.

A release sleeve upper end 3 is disposed between the release sleeve 6 and the upper joint 1, and one end of the release sleeve upper end 3 is inserted into the release sleeve 6, and the other end is sleeved outside the upper joint 1, and is connected to the upper joint 1 through the start pin 9. A pressure chamber is formed between the upper joint 1 and the upper end 3 of the release sleeve. Specifically, the outer wall of the upper joint 1 is bounded by the pressure transmission hole 13 such that the outer diameter of the end of the upper joint 1 away from the release sleeve 6 is larger than that of the upper joint 1 The outer diameter of one end of the sleeve 6 is released and formed into a stepped shape, so that the recessed area formed by the outer wall on both sides of the pressure transmitting hole 13 and the recessed area of the inner wall of the upper end of the release sleeve 3 constitute a pressure chamber, and the two ends of the pressure chamber are respectively provided There is a first sealing structure, wherein the first sealing structure at both ends of the pressure chamber is respectively disposed between the end of the upper joint 1 away from the release sleeve 6, the end of the upper joint 1 near the release sleeve 6 and the upper end 3 of the release sleeve, in this embodiment The first sealing structure is composed of a seal support ring 11 and an O-ring 15 and is combined and sealed.

The upper joint 1 is internally provided with a hydraulic chamber, and the side walls of the hydraulic chamber are symmetrically arranged on the side wall. The pressure transmitting hole 13 communicating with the pressure chamber communicates the pressure between the hydraulic chamber and the pressure chamber, so that the pressure generated by the hydraulic chamber when the hand thrower is pressed enters the hydraulic chamber through the pressure transmitting hole 13.

A retaining ring 4 is disposed between the pawl 12 and the upper end 3 of the release sleeve. The retaining ring 4 is sleeved on the upper joint 1, and the retaining ring 4 is connected to the release sleeve 6 through the threaded fastener to protect the pawl 12 from being prevented. Damage to the pawl 12 due to excessive movement of the upper end 3 of the release sleeve.

The upper joint 1 is provided with a lock ring 5 for limiting the upper end 3 of the release sleeve. As shown in FIG. 1, the inner wall of the joint of the upper end of the release sleeve 3 and the retaining ring 4 is provided with a lock groove. When the position of the lock groove corresponds to the lock ring 5, the lock groove and the lock ring 5 cooperate with the upper end of the release sleeve 3 The axial limit, that is, when the lock groove follows the release sleeve upper end 3 and the guard ring 4 to the position of the lock ring 5, the lock ring 5 is bounced into the slot, and the release sleeve upper end 3 and the upper joint 1 are locked, up and down None of them can continue to move.

The ratchets of the pawl 12 are connected to the upper joint 1 by a toothed engagement with a tooth bearing angle of 35°. When the internal pressure of the hand thrower is greater than a certain value of the external pressure, the starting pin 9 is cut, the release sleeve 6 is descended, the pawl 12 is disabled, the ratchet of the pawl 12 is opened, and the upper joint 1 is only passed through its end close to the lower joint 8. The throwing pin 10 provided on the top is connected to the trickle. At this time, once the tension applied to both ends of the upper joint 1 and the lower joint 8 reaches the shear value of the throwing pin 10, the throwing pin 10 is sheared, thereby disengaging the upper joint 1 and the lower joint 8. In addition, the lower joint 8 is fixedly connected to the thorn, so that the pawl 12 is always connected to the lower joint 8, and an O-ring 15 for sealing is provided between the lower joint 8 and the pawl 12.

A second sealing structure is disposed between the end of the upper joint 1 adjacent to the lower joint 8 and the thorn. In the present embodiment, the second sealing structure is composed of a sealing support ring 11 and an O-ring 15 and is combined and sealed.

The upper end of the upper joint 1 is sleeved with an upper centralizer 2, and the upper joint 1 and the upper centralizer 2 are connected by a thread. The lower end of the lower joint 8 is sleeved with a lower centralizer 7, and the lower joint 8 is connected to the lower centralizer 7 by a thread. The upper centralizer 2 and the lower centralizer 7 act as a righting aid to the entire hand lost device. A retaining screw 14 is further disposed between the upper centralizer 2 and the upper joint 1 and between the lower centralizer 7 and the lower joint 8.

When used, the starting pin 9 and the lost pin 10 can also be flexibly set according to actual well conditions. The buckles on both ends of the upper joint 1 and the lower joint 8 are 2-7/8EUE, and can be processed into other buckle types as needed. The inner diameter of the hydraulic chamber is 62mm, and the inside is smooth, without steps and diameter reduction.

The working principle of the embodiment is that the upper joint 1 and the lower joint 8 are connected by the pawl 12 when entering the well, and the lost pin 10 is not subjected to force; after the completion of the tubular string is in place, due to the seated packer or the acid pressure construction There is a pressure difference inside and outside the oil pipe, so pressure is generated inside the hand thrower, and the pressure enters the pressure chamber through the pressure transmitting hole 13. Since the inner upper end surface of the release sleeve 3 has a smaller piston area than the lower end surface, the upper end 3 of the release sleeve is subjected to the downward force. . When the resultant force reaches the shear value of the starting pin 9, the starting pin 9 is cut, and the retaining ring 4 and the release sleeve 6 which are integrally connected with the release sleeve 6 by the threaded sleeve are descended together. The inner diameter of the upper end of the release sleeve 6 is large, and it is impossible to continue to cover the step of the pawl 12 after descending, causing the pawl 12 to bounce and the connection with the upper joint 1 to fail. When the lock groove descends to the position of the lock ring 5, the lock ring 5 is bounced into the lock groove, and the upper end of the release sleeve 3 and the upper joint 1 are locked, and the upper and lower sides cannot continue to move. The upper joint 1 and the lower joint 8 are completely connected by the throwing pin 10 in the case where the pawl 12 fails. If the tension received by the upper and lower joints 8 reaches the shear value of the throwing pin 10, the pin is cut, and the upper joint 1 Disengaged from the lower joint 8 to complete the hand movement.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to Many modifications and variations will be apparent to those skilled in the art. The embodiment was chosen and described in order to best explain the principles and embodiments of the invention,

Claims

A machine-liquid integrated hand-discharging device, comprising: an upper joint, a lower joint and a pawl, wherein the upper joint and the lower joint are respectively connected to two ends of the pawl; the outer sleeve of the pawl is sleeved a release sleeve that moves along an axial direction thereof, a stepped outer wall of the pawl is provided with a step, and an inner wall of the release sleeve is provided with a groove that cooperates with the step, and the step cooperates with the groove The pawl is restrained; the upper end of the release sleeve is disposed between the release sleeve and the upper joint, one end of the upper end of the release sleeve is inserted into the release sleeve, and the other end is sleeved outside the upper joint And connecting with the upper joint through a starting pin; forming a pressure chamber between the upper joint and the upper end of the release sleeve, the upper joint is internally provided with a hydraulic chamber, and the side wall of the hydraulic chamber is radially symmetrically disposed Two pressure transmitting holes communicating with the pressure chamber.
The machine-liquid integrated hand thrower according to claim 1, wherein an outer wall of the upper joint is bounded by the pressure transmitting hole, and an outer diameter of one end of the upper joint away from the release sleeve is larger than another One end; an outer wall on both sides of the pressure transmitting hole and an inner wall of the upper end of the release sleeve constitute a pressure chamber, and two ends of the pressure chamber are respectively provided with a first sealing structure.
The liquid-liquid integrated hand-handling device according to claim 2, wherein a guard ring is disposed between the pawl and the upper end of the release sleeve, the guard ring is sleeved on the upper joint, and the guard The loop is connected to the release sleeve by a threaded fastener.
The machine-liquid integrated hand thrower according to claim 3, wherein the upper joint is provided with a lock ring for limiting the upper end of the release sleeve.
The machine-liquid integrated hand thrower according to claim 4, wherein the inner wall of the joint between the upper end of the release sleeve and the grommet is provided with a lock groove, and the position of the lock groove corresponds to the lock ring The lock slot and the lock ring cooperate to axially limit the upper end of the release sleeve.
The machine-liquid integrated hand thrower according to claim 1, wherein the ratchet teeth of the pawl and the upper joint are coupled by a tooth, and the tooth bearing angle is 35°.
The machine-liquid integrated hand thrower according to claim 6, wherein one end of the upper joint near the lower joint is connected to the handle by a throwing pin, and the lower joint is fixedly connected to the handle.
The machine-liquid integrated hand thrower according to claim 7, wherein a second sealing structure is disposed between an end of the upper joint adjacent to the lower joint and the thorn.
The machine-liquid integrated hand-handling device according to claim 1, wherein an end of the upper joint is sleeved with an upper end centralizer, and the upper joint and the upper centralizer are connected by a thread.
The machine-liquid integrated hand-handling device according to claim 1, wherein the end of the lower joint is sleeved with a lower end centralizer, and the lower joint and the lower centralizer are connected by a thread.